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If gst_video_overlay_rectangle_apply_global_alpha is called with a rectangle with unsuitable alpha, expanding the alpha plane will fail, and thus lead to dereferencing a NULL src pointer. It's not certain this will happen in practice, as the function is static and callers might ensure suitable alpha before calling, but there is no apparent explicit such check. Add prologue asserts for proper alpha to explicitely prevent this. Coverity 1139707 |
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